1220211111024 has 100 divisors (see below), whose sum is σ = 3531885485040. Its totient is φ = 406709337600.

The previous prime is 1220211111017. The next prime is 1220211111071. The reversal of 1220211111024 is 4201111120221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1220211110988 and 1220211111006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29487949 + ... + 29529299.

Almost surely, 2^{1220211111024} is an apocalyptic number.

It is an amenable number.

1220211111024 is an abundant number, since it is smaller than the sum of its proper divisors (2311674374016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220211111024 is a wasteful number, since it uses less digits than its factorization.

1220211111024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64140 (or 64125 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1220211111024 its reverse (4201111120221), we get a palindrome (5421322231245).

The spelling of 1220211111024 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred eleven thousand, twenty-four".